p^2+4p-18=0

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Solution for p^2+4p-18=0 equation:


Simplifying
p2 + 4p + -18 = 0

Reorder the terms:
-18 + 4p + p2 = 0

Solving
-18 + 4p + p2 = 0

Solving for variable 'p'.

Begin completing the square.

Move the constant term to the right:

Add '18' to each side of the equation.
-18 + 4p + 18 + p2 = 0 + 18

Reorder the terms:
-18 + 18 + 4p + p2 = 0 + 18

Combine like terms: -18 + 18 = 0
0 + 4p + p2 = 0 + 18
4p + p2 = 0 + 18

Combine like terms: 0 + 18 = 18
4p + p2 = 18

The p term is 4p.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4p + 4 + p2 = 18 + 4

Reorder the terms:
4 + 4p + p2 = 18 + 4

Combine like terms: 18 + 4 = 22
4 + 4p + p2 = 22

Factor a perfect square on the left side:
(p + 2)(p + 2) = 22

Calculate the square root of the right side: 4.69041576

Break this problem into two subproblems by setting 
(p + 2) equal to 4.69041576 and -4.69041576.

Subproblem 1

p + 2 = 4.69041576 Simplifying p + 2 = 4.69041576 Reorder the terms: 2 + p = 4.69041576 Solving 2 + p = 4.69041576 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + p = 4.69041576 + -2 Combine like terms: 2 + -2 = 0 0 + p = 4.69041576 + -2 p = 4.69041576 + -2 Combine like terms: 4.69041576 + -2 = 2.69041576 p = 2.69041576 Simplifying p = 2.69041576

Subproblem 2

p + 2 = -4.69041576 Simplifying p + 2 = -4.69041576 Reorder the terms: 2 + p = -4.69041576 Solving 2 + p = -4.69041576 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + p = -4.69041576 + -2 Combine like terms: 2 + -2 = 0 0 + p = -4.69041576 + -2 p = -4.69041576 + -2 Combine like terms: -4.69041576 + -2 = -6.69041576 p = -6.69041576 Simplifying p = -6.69041576

Solution

The solution to the problem is based on the solutions from the subproblems. p = {2.69041576, -6.69041576}

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